Pedestal-extension-table lock.



E. TYDBN. PEDBSTAL EXTENSION TABLE LOCK.

l, APPLIUATION FILED MAB. 8, 1909.

Patented J an. 10, 1911.

UNITED sTATEs PATENT oEEioE.

EMIL TYDEN, 0F HASTINGS, MICHIGAN.

PEDESTAL-EXTENSIO-TABLE LOCK.

To all whom it may concern:

Be it known that I, EMIL TYDEN, a citizen of the United States, residing at Hastings, in the countyof Barry and State of Michigan, have invented new and useful Improvements in Pedestal-Extension-TableLocks, of which the following is :a specification, reference being had to.the accompanying drawings, forming apart thereof.

The purpose of this invention is to provide an improved device for locking together the divided members of the pedestal of an extension table.

It consistsof the featuresof construction shown and vdescribed as indicated in the claims.

In the drawings Figure 1 is a vertical longitudinal .section of a pedestal Vtable equipped with this invention. Fig. 2 is a detail section at the line 2 2 on Fig. 1. Fig. 3 is a top plan view, partly sectional, at the same plane as Fig. 2. Fig. 4 is a detail section at the line 4 4 on Fig. 2. Fig. 5 is an enlarged detail section of the latchengaging device at the same plane as Fig. 1. Fig. 6 is a section at the line 6 6 on Fig. 5. Fig. 7 is a view similar to Fig. 5 showing a modified form of the latch-engaging device. Fig. 8 is a detail section on the line 8 8 of Fig. 1, showing in side elevation, a locking segment.

Upon the two .members .of the pedestal there are mounted respectively cooperating engaging devices, 1 and 2, one of said devices, the element, l, being pivotally mounted. Upon the pedestal having the pivotally mounted device there is mounted a vertical rock shaft, 3, having at the lower end a laterally jutting pivotstud and operating lever arm, 4, on which the engaging device, 1, is pivoted. Said pivot stud or lever arm, 4, protrudes intoa horizontally extended slot, 5a, in the bracket, 5, in which the vertical rock shaftis stopped and journaled for turning about its vert-ical axis. This bracket is most conveniently made of sheet metal yfolded to form a yoke or loop between whose side members the vertical rock shaft, 3, extends, one of said side members having the slot, 5a, mentioned into which the stud, 4, protrudes, the cross neck, 5b, of the bracket having an aperture, 5, through which the pivoted element protrudes. -Said pivoted element, 1,has a stop lug or tail piece, la, projecting from its upper `edge in position for encounter with the cross neck of Specicaton of Letters Patent.

Application filed March 8, 1909.

Patented J an. 10, 1911.

Serial No. 482,163.

the bracket when the pivot stud or lever arm, 4, of the rock shaft, 3, is approaching the inner end of the slot, 5a, so that the remote hooked en d of the element, 1, will be lifted out of engagement with the element, 2, by the time the lever arm, 4, reaches the inner end of said slot and will be dropped into position for engagement with said element 2 during the first part of the movement of said stud in the opposite direction. At the upper part of the rock shaft, 3, it may be provided with any suitable means for rocking it `through an angle of about sixty degrees for causing the pivot stud or lever arm, 4, to traverse the length of the slot, 5a, and any suitable means may be provided for rocking the rock shaft by means of such operating device. As illustrated, the rock shaft is provided at its upper end with a short crank arm, 3a, which swings over a segment, 6, mounted onthe top of the pedestal provided with a shoulder, 6a, having one side sloping, and lthe other side abrupt, the lever arm snapping into engagement with the abrupt shoulder at the point in the rocking of the shaft at which the short lever arm, 4, is at the outer limit of the slot, 5a.

The operation of the device will be obvious upon inspection as follows: The lever arm, 3a, being swung to the opposite limit ofits movement from that at which it may be engaged with the abrupt shoulder of the segment,i6, the engaging device, 1, is projected toward the opposite pedestal member, and uponthe members being closed together passes intoposition for engagement with the engaging device, 2, on said opposite member.

VThe operator then rocking the shaft, 3, by

means of the lever arm, 3, first causes the element, 1, to drop into engagement with the element, 2, and then to draw said element, 1, back toward the pedestalvmember on which it is mounted, drawing the two pedestal `members into close engagement, and the crank arm4 being at the limit of that movement engaged with the abrupt end of the shoulder, 6a, the two pedestal members are locked together. It will be understood that the device'in the form described and ywithoutmeans for operating the rock shaft except such as may be accessible directly at the top of the pedestal is intended to be applied upon tables having the vtop members separable for some distance more or less before the pedestal members are separated, so that access isthereby obtained to the upper end of the rock shaft, and for Ylocking the pedestal, the operator having lirst separated the table members as indicated, getting aocess'to the crank arm, Safreleasing it from the segment and rocking it baekin the opposite direction, will cause the element, l, to be thrust inward by the pivot stud, 4, and such inward thrust will irst relax the clamping engagement of the two members, l and 2, and neXt by the encounter of the tail l of the element l, with the cross neck of the bracket 5, lift the member, l, out of engagement with the member, 2, so that the pedestal members may be separated.

Applying any locking device oi' the general class to which the above described device belongs,that is, having two engaging elements secured to the pedestal members respectively and adapted to become engaged as they approach, one of them being` o-perable to draw the two members together after they are engaged,-it is a lmatter of great convenience to be able to adapt the same devices to pedestals of slightly different width or distance between the opposite walls to which their respective engaging devices are connected; and for that purpose the element, 2, is desirably of the form shown in the drawings, in which it consists of a lever pivoted between its ends upon a liXed bracket,

9, on the pedestal member, the element, l, being engaged with the upper end of said lever, the lower end being provided with means for adjusting it in and out with respect to the pedestal Wall on which the device is mounted. A convenient means for such adjustment consists in a threaded post, stud or bolt, l0, rigid with the bracket, 9, extendingl through the lower end of the element, 2, and across a nut aperture therein in which is lodged a nut, l1, engaged with the threaded bolt or stud, 10, the nut being fitted tightly'to the bolt so as not to be liable to movement thereon without action of the operator, serves to hold the element, 2, in position to which it may be adjusted by screw- Vment, 1, with the upper end of the element,

2, may at all times be secure, notwithstanding the oblique position to which the element, 2, may be adjusted in the manner above described, the said element, 2, has the upper end portion with which the hook is ,engaged consisting of amere cross bar, 2,

and the element, l, has its hook nose adapted to engage partly around said cross bar so that the angle or inclination of the element, 2, as a whole has no eilect upon the engagement. A convenient form for this element, 2, accomplishing all the purposes above described is that illustrated in which it is made by folding a piece of sheet metal or plate Vinto channel form, the bracket, 9, being made of an angle plate, as seen in Fig. 3, one flange of the angle plate being entered between the channel sides of the element, 2, for pivotal connection therewith, the web of the channel being cut away at 21` below the portion left standing to form the cross bar, 2, the channel sides being apertured at 2e for the nut, ll, and the webbing aperturcd at 2t for the bolt, l0.

A modification of means for adjusting the element, 2, is shown in F ig. 7 consisting in substituting for the stud, 10, and nut, 11, a rib or flange, 9b, jutting from the bracket, 9, between the channel sides of the element, 2, at the lower end, the channel web being cut away entirely below the pivot, slots, 2g, being made in the channel sides and a slot, 9, in the flange, 9b, said slots of the channel walls and said lug crossing each other so that a clamping bolt, l2, may extend through them for clamping the channel sides on to the lug at adjusted position of the parts.

I claim l. In a pedestal extension table, in combination with the divided pedestal members, cooperating engaging devices on the pedestal members respectively; a vertical rock shaft mounted on one pedestal member having a laterally projecting lever arm on which one of said engaging elements is pivoted for vertical swinging and loosely for permitting rotation of the rock shaft through a limited angle; means for guiding said pivoted element longitudinally toward and from thc opposite pedestal member and in its said vertical pivotal movement, said element having above its pivot an inwardly facing shoulder; a stop lixed with respect to the axis of the rock shaft for encounter with such shoulder at the inward limit of the range of movement of the pivot stud, and means for turning the rock shaft and for locking it at the inner limit of such movement.

2. ln a pedestal extension table, in combi` nation with the divided pedestal members, cooperating engaging elements on the members respectively, one of said elements being pivotally mounted on the member to which it pertains; a vertical rock shaft journaled on said member and provided with a laterally jutting lever arm which serves as the pivot for such pivotal engaging element; a bracket mounted adjacent to the rock shaft and fixed with respect to the pivotal axis of the latter, having a slot extending in the plane of the movement of said lever arm pivot with which the latter is engaged, the pivoted element having an inwardly facing shoulder; means on the bracket in position for ei'icounter Vby said shoulder at the limit of the inward movement of said pivoted element, and means for rocking the shaft and for locking it at one limit of its rocking movement.

In a pedestal extension table, in combination with two divided pedestal members, cooperating engaging devices mounted on the two members respectively for connecting them together; means fo-r operating upon one of said engaging devices for forcing the pedestal members together after they are connected, the other engaging device being pivotally mounted on the pedestal member to which it pertains and positioned for engagement with the cooperating element at a distance from its pivot, and means for adjusting it about its pivot to vary the distance of the point of engagement from the parting plane.

4t. In a pedestal extension table, in combination with the divided pedestal members; cooperating engaging devices mounted on the two members respectively; means for operating upon one of said elements to force the two pedestal members together after said elements are engaged, the other element being lever fulcrumed intermediate its ends upon the pedestal member on which it is mounted and positioned for engagement at one end with the cooperating element, and means for adjusting it at the other end toward and from the parting plane.

5. In a pedestal extension table, in combination with two divided pedestal members; cooperating engaging devices mounted on the members respectively for connecting them, one of said elements being a lever fulcrumed between its ends on the pedestal member to which it pertains, positioned for engagement of one end with the cooperating element, and provided at the other end with means for adjust-ably securing that end at varying distances from the parting plane.

6. In a pedestal extension table, in combination with divided pedestal members, cooperating engaging devices on the pedestal members respectively; a vertical rock shaft mounted on one pedestal member having a projecting lever arm loosely engaging one of said engaging elements; means for guiding said element longitudinally toward and from the opposite pedestal member; an abutment xed with respect to the axis of the rock shaft, said element having a coperating abutment for encounter with the first at the inward limit of its longitudinal movement, and means for operating and locking the rock shaft.

7. In a pedestal extension table, in combination with two divided pedestal members, cooperating engaging devices mounted on the members respectively for connecting them, means for actuating one of said members to draw the pedestal members together, the other of saidA members being mounted intermediate its ends on'the pedestal member to which it pertains, having one end provided with means for engaging the other member, and a screw and nut connecting its other end with said pedestal member for adjustably securing said end at all varying distances from the parting plane within the range of adjustment of said nut and screw.

In testimony whereof, I have hereunto set my hand at Chicago, Illinois, this 3d day of March, 1909.

EMIL4 TYDEN.

Witnesses: J. S. ABBOTT,

M. GERTRUDE ADY. 

